Groomers, has a dog ever burst his eye blood vessels from stress?

Hi groomers...I need some help and insight here because I'm really not sure what's going on...

My dog is normally really good at groomers - he's 5 and has gone to a new one pretty much on a yearly basis since we moved a lot and I've only gotten positive feedback from groomers - pet smart, private, boutique, you name it. I went to a new one that got high reviews yesterday and they told me to pick him up because he is too nervous. When I went to pick him up, both his eyes were completely bloodshot, and his left eye has bulged out to the point where I can see red swelling under his eyeball. The groomer said this happens when the dog is so anxious, that his eyes bulge out and the vessels burst?! He said this has happened a few times before at their shop and it goes away on its own after a week. Has anyone else experienced this?? I groom my dog at home sometimes when I'm trying to save money, and he is not the anxious type, he just gets fussy or annoyed when I'm doing certain areas he doesn't like.

The groomer only managed to clip 2 toe nails and did nothing else in the entire hour he was there because he got too nervous and he claims he never pushes or stresses the dog out too much, which is really odd considering my dog's eyes apparently bulged out and turned blood red because of anxiety...he also mentioned that his previous clients that went to a vet after this has happened to them, said that the vet said this cannot happen from stress, and normally happens from head trauma?! I am taking him to an Emerg Vet, but I wanted to know what a groomer's point of view is on this matter.


Any insights or experiences appreciated!